FLOOD: Oh, Merry Christmas, Abdul. Stop making such a fuss. Never seen a TARDIS before?

DOCTOR: I know these teeth. What? What? What?!

DOCTOR: Rose Tyler. I was going take you to so many places. Barcelona. Not the city Barcelona, the planet Barcelona. You'd love it. Fantastic place. They've got dogs with no noses. Imagine how many times a day you end up telling that joke, and it's still funny.

DOCTOR: Everybody lives, Rose. Just this once, everybody lives!

DOCTOR: You know, one day, just one day, maybe, I'm going to meet someone who gets the whole ‘don't wander off’ thing. Nine hundred years of phone box travel, it's the only thing left to surprise me.

DOCTOR: Mister Spock?

ROSE: What was I supposed to say? You don't have a name. Don't you ever get tired of Doctor? Doctor who?

DOCTOR: Nine centuries in, I'm coping.

K9: Optimism. Belief that everything will work out well. Irrational, bordering on insane.